class Test { public static void main(String[] args) { new Test().getNum(20); } public void getNum(int sum){ for (int i = 1; i < sum/2; i++) { println("第" + i + "组:<" + i + "," + sum-i + "〉" ); } } }
public static void main(String[] args){ int[] a ={1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19}; for(int i=0;i<a.length/2;i++){ for(int j=0;j<a.length;j++){ if(a[i]+a[j]==20){ System.out.println(a[i]+","+a[j]); } } } }
public class GetSun { public static void main(String[] args) { int sum = 0; for(int i = 1; i <= 19; i++){ for(int j = 1; j <= 19; j++){ if(i + j == 20){ if(!(i > j)) System.out.println(i + " " + j); } } } } }
五楼的更好些,把自己的有修改了一下public class GetSun { public static void main(String[] args) { int sum = 0; for(int i = 1; i <= 19; i++){ for(int j = 1; j <= 19; j++){ if((i + j == 20) && (i < j)){ System.out.println(i + " " + j); } } } } }输出: 1 19 2 18 3 17 4 16 5 15 6 14 7 13 8 12 9 11 10 10
public static void main(String[] args) {
// TODO Auto-generated method stub for(int i=1;i<=10;i++){
int j=20-i;
System.out.println("当i="+i+",j="+j+"时,他们的和为20!");
}
}
int y=0;
int sum=20;
for(int x=1;x<=10;i++){
y=sum-x;
System.out.println("x="+x,"y="+y);
}
int start = 1;
int end = 20 - start;
while(start < end) {
System.out.println("<" + (start++) + " , " + (end--) + ">");
}
/*
<1 , 19>
<2 , 18>
<3 , 17>
<4 , 16>
<5 , 15>
<6 , 14>
<7 , 13>
<8 , 12>
<9 , 11>
*/
new Test().getNum(20);
} public void getNum(int sum){
for (int i = 1; i < sum/2; i++) {
println("第" + i + "组:<" + i + "," + sum-i + "〉" );
}
}
}
int[] a ={1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19};
for(int i=0;i<a.length/2;i++){
for(int j=0;j<a.length;j++){
if(a[i]+a[j]==20){
System.out.println(a[i]+","+a[j]);
}
}
}
}
public class GetSun { public static void main(String[] args) {
int sum = 0;
for(int i = 1; i <= 19; i++){
for(int j = 1; j <= 19; j++){
if(i + j == 20){
if(!(i > j))
System.out.println(i + " " + j);
}
}
}
}
}
int sum = 0;
for(int i = 1; i <= 19; i++){
for(int j = 1; j <= 19; j++){
if((i + j == 20) && (i < j)){
System.out.println(i + " " + j);
}
}
}
}
}输出:
1 19
2 18
3 17
4 16
5 15
6 14
7 13
8 12
9 11
10 10